The American Enterprise Institute reports that the “best predictor” of which party wins the White House is whether or not the Washington Redskins win their last home game before the election.

If the Redskins win, the incumbent party tends to win; if they lose, the White House changes parties. The Redskins indicator has been wrong only one since 1948, AEI says—and that was in 2004 when President George W. Bush held onto the White House despite a Redskins loss.

The ‘Skins play the Pittsburgh Steelers on Monday, Nov. 3, less than seven hours before polling places open in most eastern time-zone jurisdictions.